The Government Accountability Office has found that civilian agencies spentÂ $661 million to use and maintain federally-owned aircraft in the government’s 2015 fiscal year.
GAO said Monday 11 civilian agencies own 924 aircraftÂ as of July 2016 and that figure includesÂ 495 airplanes, 414 helicopters, 14 unmanned aircraft systems and oneÂ glider.
The State Department owns the most number of aircraft at 248 units while theÂ National Science FoundationÂ has the least at three, GAO added.
Auditors notedÂ 88Â of 924 aircraft were non-operational as of July and can beÂ used for parts, displayed or destroyed.
Civilian agencies spent approximately $652 million onÂ operational aircraft which were flown atÂ an average of 275 flight hours in FY 2015, GAO said.
Agencies usually report costs in categories such asÂ maintenance, overhead, fuel or oil and crew, the report stated.
GAO sought commentsÂ on its report from NSF, NASA, Tennessee Valley Authority and the departments of State,Â Agriculture, Commerce, Energy, Homeland Security, Interior, JusticeÂ and Transportation.